/* ═══════════════════════════════════════════════════════════════
   GASA WORKSHOP — BASE
   Reset, typography, layout primitives, keyframes.
   No color literals — references theme tokens only.
═══════════════════════════════════════════════════════════════ */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text-soft);
  background: var(--space-900);
  overflow-x: hidden;
  position: relative;
}

/* ── Starfield + deep-space gradient backdrop ─────────────────── */
.starfield {
  position: fixed;
  inset: 0;
  z-index: -2;
  display: block;
}

body::before {
  /* nebula glow wash, sits above the starfield canvas */
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(1100px 700px at 78% -8%, rgba(45, 226, 255, 0.12), transparent 60%),
    radial-gradient(900px 650px at 12% 8%, rgba(255, 61, 129, 0.1), transparent 60%),
    radial-gradient(1200px 900px at 50% 120%, rgba(59, 240, 160, 0.07), transparent 55%);
}

/* ── Scanline overlay (very subtle CRT feel) ──────────────────── */
.scanlines {
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
  opacity: 0.5;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.018) 0px,
    rgba(255, 255, 255, 0.018) 1px,
    transparent 1px,
    transparent 3px
  );
  mix-blend-mode: overlay;
}

/* ── Typography ───────────────────────────────────────────────── */
h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  color: var(--text);
  line-height: 1.08;
  letter-spacing: 0.01em;
  margin: 0 0 var(--space-md);
  font-weight: 800;
}

h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  letter-spacing: 0.005em;
}

h2 {
  font-size: clamp(1.9rem, 4vw, 2.9rem);
}

h3 {
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
}

p {
  margin: 0 0 var(--space-md);
}

a {
  color: var(--cyan);
  text-decoration: none;
}

strong {
  color: var(--text);
  font-weight: 600;
}

code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  color: var(--green);
  background: rgba(59, 240, 160, 0.09);
  padding: 0.12em 0.4em;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(59, 240, 160, 0.18);
}

::selection {
  background: var(--cyan);
  color: var(--space-900);
}

/* ── Layout primitives ────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-3xl) 0;
  position: relative;
}

.section--tight {
  padding: var(--space-2xl) 0;
}

.section-head {
  max-width: var(--container-narrow);
  margin: 0 auto var(--space-2xl);
  text-align: center;
}

.section-head.is-left {
  margin-left: 0;
  text-align: left;
}

/* ── Eyebrow / mono section label ─────────────────────────────── */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: var(--space-md);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan));
}

.eyebrow.is-alert {
  color: var(--alert);
}
.eyebrow.is-alert::before {
  background: linear-gradient(90deg, transparent, var(--alert));
}
.eyebrow.is-green {
  color: var(--green);
}
.eyebrow.is-green::before {
  background: linear-gradient(90deg, transparent, var(--green));
}

.lead {
  font-size: clamp(1.05rem, 1.6vw, 1.28rem);
  color: var(--text-soft);
}

.muted {
  color: var(--text-muted);
}

/* ── Accessibility helpers ────────────────────────────────────── */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 10000;
  background: var(--cyan);
  color: var(--space-900);
  padding: 0.6rem 1rem;
  font-weight: 700;
}
.skip-link:focus {
  left: var(--space-md);
  top: var(--space-md);
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ═══════════════════════════════════════════════════════════════
   KEYFRAMES
═══════════════════════════════════════════════════════════════ */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.25; }
}

@keyframes radar-sweep {
  to { transform: rotate(360deg); }
}

@keyframes pulse-ring {
  0% { transform: scale(0.6); opacity: 0.8; }
  100% { transform: scale(2.2); opacity: 0; }
}

@keyframes float-blip {
  0%, 100% { opacity: 0.25; }
  40% { opacity: 1; }
}

@keyframes flicker {
  0%, 19%, 21%, 100% { opacity: 1; }
  20% { opacity: 0.55; }
}

@keyframes rise {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Scroll-reveal: hidden until .is-visible (set by IntersectionObserver) */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }
  .reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .radar-sweep,
  .pulse-ring,
  .status-dot,
  .radar-play,
  .radar-play::before,
  .radar-play::after,
  .blip { animation: none !important; }
  .radar-prompt { animation: none !important; opacity: 1; }
}